private void toolStripMenuItemQTCT_Click(object sender, EventArgs e)
        {
            frmTGCT t = new frmTGCT();

            t.Show();
            this.Hide();
        }
        private void btnTGCT_Click(object sender, EventArgs e)
        {
            frmTGCT frm = new frmTGCT();

            frm.Show();
            this.Hide();
        }
        private void btnQuaTrinhCongTac_Click(object sender, EventArgs e)
        {
            frmTGCT frm = new frmTGCT();

            frm.Show();
            this.Hide();
        }